Organic Light-Emitting Diode (oled) Array Substrate, Method of Manufactering the Same, and Related Display Apparatus

1. An Organic Light Emitting Diode (OLED) array substrate, comprising: a plurality of pixels arranged in an array on a base substrate, wherein: each pixel comprises a first sub-pixel and a second sub-pixel displaying different colors; each sub-pixel comprises a light emitting unit and a control circuit; and an orthogonal projection of the control circuit of the second sub-pixel on the base substrate completely covers an orthogonal projection of the light emitting unit of the first sub-pixel on the base substrate.

2. The OLED array substrate according to claim 1 , wherein the first sub-pixel is located above the second sub-pixel.

3. The OLED array substrate according to claim 1 , wherein the first sub-pixel is a white-light emitting sub-pixel.

4. The OLED array substrate according to claim 1 , wherein: the second sub-pixel includes at least one of a green-light emitting sub-pixel, a red-light emitting sub-pixel and a blue-light emitting sub-pixel.

5. An Organic Light Emitting Diode (OLED) array substrate, comprising: a plurality of pixels arranged in an array on a base substrate, wherein: each pixel comprises a first sub-pixel and a second sub-pixel displaying different colors; each sub-pixel comprises a light emitting unit and a control circuit; and an orthogonal projection of the light emitting unit of the first sub-pixel on the base substrate overlaps with an orthogonal projection of the control circuit of the second sub-pixel on the base substrate; the second sub-pixel includes at least one of a green-light emitting sub-pixel, a red-light emitting sub-pixel and a blue-light emitting sub-pixel; and within the pixel: the green-light emitting sub-pixel and the red-light emitting sub-pixel are arranged side by side in a mirrored position; an area of the blue-light emitting sub-pixel is larger than an area of the green-light emitting sub-pixel or an area of the red-light emitting sub-pixel; and control circuits of the green-light emitting sub-pixel, the red-light emitting sub-pixel, and the blue-light emitting sub-pixel are in the middle of the pixel.

6. The OLED array substrate according to claim 4 , wherein within the pixel: the green-light emitting sub-pixel and the red-light emitting sub-pixel are arranged side by side in a mirrored position; and the blue-light emitting sub-pixel is arranged to be side by side in a mirrored position with a red-light emitting sub-pixel of an adjacent pixel.

7. An Organic Light Emitting Diode (OLED) array substrate, comprising: a plurality of pixels arranged in an array on a base substrate, wherein: each pixel comprises a first sub-pixel and a second sub-pixel displaying different colors; each sub-pixel comprises a light emitting unit and a control circuit; and an orthogonal projection of the light emitting unit of the first sub-pixel on the base substrate overlaps with an orthogonal projection of the control circuit of the second sub-pixel on the base substrate; the first sub-pixel is located above the second sub-pixel; the control circuit of the first sub-pixel includes a bottom-gate thin film transistor (TFT); the light emitting unit of the second sub-pixel includes in sequence a reflective layer, a transparent electrode layer, a light emitting layer, and a cathode layer; and a gate layer of the bottom-gate TFT is formed of a same material as that of the reflective layer of the light emitting unit of the second sub-pixel.

8. The OLED array substrate according to claim 7 , wherein: the light emitting unit of the second sub-pixel further includes a semiconductor layer in between the reflective layer and the transparent electrode layer; and the semiconductor layer and an active layer of the bottom-gate TFT are formed of a same material.

9. The OLED array substrate according to claim 8 , wherein the semiconductor layer is an oxide layer.

10. A display panel comprising the OLED array substrate according to claim 1 .

11. A method for manufacturing the OLED array substrate according to claim 1 , the method comprising: forming the control circuit of the second sub-pixels on the base substrate; and forming the first sub-pixels subsequently; forming a bottom-gate thin film transistor (TFT) to be the control circuit of the first sub-pixel; and forming, in sequence, a reflective layer, a transparent electrode layer, a light emitting layer and a cathode layer to establish the light emitting unit of the second sub-pixel, wherein a gate layer of the bottom-gate TFT and the reflective layer of the light emitting unit of the second sub-pixel are formed in a same film forming process.

12. The manufacturing method according to claim 11 , further comprising: forming a semiconductor layer located between the reflective layer and the transparent electrode layer of the light emitting unit of the second sub-pixel.

13. The manufacturing method according to claim 11 , further comprising: forming a transparent electrode layer of the light emitting unit of the first sub-pixel.